android 自定义View加载圆形进度条

public CircleProgressBar(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);paint = new Paint();TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.progressCircleBar);roundColor = typedArray.getColor(R.styleable.progressCircleBar_roundColor, Color.WHITE);roundProgressColor = typedArray.getColor(R.styleable.progressCircleBar_roundProgressColrc, Color.RED);textColor = typedArray.getColor(R.styleable.progressCircleBar_textColcr, Color.BLACK);textSize = typedArray.getDimension(R.styleable.progressCircleBar_circletextSize, 0);roundwitdth = typedArray.getDimension(R.styleable.progressCircleBar_roundWidth, 0);max = typedArray.getInteger(R.styleable.progressCircleBar_max, 0);textisDiaplayAble = typedArray.getBoolean(R.styleable.progressCircleBar_textIsDisplayable, true);style = typedArray.getInt(R.styleable.progressCircleBar_style, 0);typedArray.recycle();}

<declare-styleable name="progressCircleBar"><attr name="roundColor" format="color"></attr><attr name="roundProgressColrc" format="color"></attr><attr name="roundWidth" format="dimension"></attr><attr name="textColcr" format="color"></attr><attr name="circletextSize" format="dimension"></attr><attr name="max" format="integer"></attr><attr name="textIsDisplayable" format="boolean"></attr><attr name="style"><enum name="STROKE" value="0"></enum><enum name="FILL" value="1"></enum></attr></declare-styleable>

@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);int centre = getWidth() / 2;int radius = (int) (centre - roundwitdth / 2); //圆环的半径paint.setColor(roundColor);paint.setStyle(Paint.Style.STROKE);paint.setStrokeWidth(roundwitdth);paint.setAntiAlias(true);//消除锯齿canvas.drawCircle(centre,centre,radius,paint);/*** 画进度百分比*/paint.setStrokeWidth(0);paint.setColor(textColor);paint.setTextSize(textSize);paint.setTypeface(Typeface.DEFAULT_BOLD); //设置字体int percent = (int)(((float)progress / (float)100) * 100);  //中间的进度百分比，先转换成float在进行除法运算，不然都为0float textWidth = paint.measureText(percent + "%");   //测量字体宽度，我们需要根据字体的宽度设置在圆环中间if(textisDiaplayAble && percent != 0 && style == STROKE){canvas.drawText(percent + "%", centre - textWidth / 2, centre + textSize/2, paint); //画出进度百分比}else{}/*** 画圆弧 ，画圆环的进度*///设置进度是实心还是空心paint.setStrokeWidth(roundwitdth); //设置圆环的宽度paint.setColor(roundProgressColor);  //设置进度的颜色RectF oval = new RectF(centre - radius, centre - radius, centre+ radius, centre + radius);  //用于定义的圆弧的形状和大小的界限switch (style) {case STROKE:{paint.setStyle(Paint.Style.STROKE);canvas.drawArc(oval, 0, 360 * progress / 100, false, paint);  //根据进度画圆弧break;}case FILL:{paint.setStyle(Paint.Style.FILL_AND_STROKE);if(progress !=0)canvas.drawArc(oval, 0, 360 * progress / 100, true, paint);  //根据进度画圆弧break;}}}

<com.example.gw.customview.CircleProgressBarandroid:id="@+id/progressbar"android:layout_gravity="center"android:layout_width="120dp"android:layout_height="120dp"attrs_ViewDemo:roundWidth="8dp"attrs_ViewDemo:style="STROKE"attrs_ViewDemo:max="80"attrs_ViewDemo:roundProgressColrc="#ADFF2F"attrs_ViewDemo:circletextSize="18sp"attrs_ViewDemo:textIsDisplayable="true"attrs_ViewDemo:roundColor="#fff" />